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Old 01-31-2013, 11:22 AM   #1
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Would a furnace with a blocked inlet shut down?


A few days ago my Trane furnace stopped working because the inlet iced over.
It took me an hour to figure out the problem, and it tried to start up over and over again.
Would it do that forever, or would it eventually quit trying to start?

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Old 01-31-2013, 01:00 PM   #2
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Would a furnace with a blocked inlet shut down?


After a hour of rest the unit will try to restart. It will lockout after 5 tries and wait a hr and start over. Icing up is VERY bad and hard on the inducer/exhaust fan also as it sucks VERY hard and overworks it and will shorten it's life and unfortunately Trane parts are NOT cheap if you get my drift. Well built but expensive.

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Old 01-31-2013, 05:22 PM   #3
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Would a furnace with a blocked inlet shut down?


What inlet are you talking about and how/why is it freezing?
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Old 01-31-2013, 07:58 PM   #4
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Would a furnace with a blocked inlet shut down?


I think they freeze up on account of the cold weather. Mine never freezes up when it is above 32 F outside.
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Old 02-01-2013, 06:16 AM   #5
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Would a furnace with a blocked inlet shut down?


If it froze up it usually is due to exhaust vapor being drawn back into intake pipe.Also if you have a screen in the intake it should be removed if you get temps that cold in your area.
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Old 02-01-2013, 07:15 AM   #6
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Would a furnace with a blocked inlet shut down?


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Originally Posted by yuri View Post
After a hour of rest the unit will try to restart. It will lockout after 5 tries and wait a hr and start over. Icing up is VERY bad and hard on the inducer/exhaust fan also as it sucks VERY hard and overworks it and will shorten it's life and unfortunately Trane parts are NOT cheap if you get my drift. Well built but expensive.

The reason I ask...
I bought a 6 year old house. The previous owners had the heat on all winter, but never came out. AFAIK they never had a problem with the furnace.
It iced over on me the first time we reached 0F.

HVAC guy is being reasonably cooperative (he installed the pipes too close together, too close to a side wall, too close to a deck, and the pipes are too close together) but has noted that the water heater vents near by, they didn't use it in the winter (they drained the pipes) and just maybe it is the problem.

I don't think so; they would have to be running at the same time to matter, and that won't happen much; but I can't say it isn't a factor, and would explain why the previous owner had a problem.

But if the inducer tries forever, then the first weather over freezing, the ice would melt and all would be back to normal. The previous owner would never know they had a problem. (as I said, they drained the pipes and kept a 2000 heater next to the water meter just in case)

I am working with the installer, and he has brought in the Trane rep; so we will get this fixed, it is just a matter of who is responsible. Speaking of which, the plumber put the WH vent too close to the furnace inlet and a side wall. The general contractor won't answer my phone calls. Would he be responsible for the plumbers failings, especially if he refuses to tell me who the plumber is? Thats a side issue, but maybe you know about it.

Sad thing is, there is another, closer wall that they could have used with no problems. Well, we may still be using it.
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Old 02-01-2013, 11:54 AM   #7
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Would a furnace with a blocked inlet shut down?


where I am the gas inspectors go thru the install manual of the furnace and water heater with a fine tooth comb ( started this several yrs ago for liability reasons I guess) and would have picked up on the water heater issue etc and red tagged it/shut it down. depends on how knowledgeable and thorough your local inspectors are. you would need to talk to a lawyer to see who is responsible but usually that costs several hundred $$/hr and by the time he is finished with you and the case it is usually much cheaper to do the repairs yourself. most of the time if you are reasonable with the general contractor and installer if they do the work at cost price and you pay for it then that is a better solution. lawyers don't have expert HVAC witneses etc and if needed to get them it costs you a fortune and by the way did I mention they charge by the hour.
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Old 02-01-2013, 09:59 PM   #8
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Would a furnace with a blocked inlet shut down?


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I think they freeze up on account of the cold weather. Mine never freezes up when it is above 32 F outside.

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